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Homepage>BS Standards>23 FLUID SYSTEMS AND COMPONENTS FOR GENERAL USE>23.060 Valves>23.060.01 Valves in general>BS EN ISO 28921-1:2017 Industrial valves. Isolating valves for low-temperature applications Design, manufacturing and production testing
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BS EN ISO 28921-1:2017 Industrial valves. Isolating valves for low-temperature applications Design, manufacturing and production testing

BS EN ISO 28921-1:2017

Industrial valves. Isolating valves for low-temperature applications Design, manufacturing and production testing

CURRENCY
LANGUAGE
English
Standard number:BS EN ISO 28921-1:2017
Pages:34
Released:2017-03-31
ISBN:978 0 580 94527 4
Status:Corrigendum
DESCRIPTION
This standard BS EN ISO 28921-1:2017 Industrial valves. Isolating valves for low-temperature applications is classified in these ICS categories:
  • 23.060.01 Valves in general

This part of ISO 28921 specifies requirements for design, dimensions, material, fabrication and production testing of isolation valves for low-temperature applications.

It applies to gate, globe, check, butterfly and ball valves and can be used for other valve types used in low-temperature services.

This part of ISO 28921 covers isolation valves for use in cryogenic temperature service where the design low-temperature service is –50 °C down to –196 °C.

This part of ISO 28921 does not apply to valves for cryogenic services, designed in accordance with ISO 21011 , used with cryogenic vessels.

Where the requirements of this part of ISO 28921 vary from those given in the valve product standards, the requirements of this part of ISO 28921 apply.

This part of ISO 28921 covers valves with body, bonnet, bonnet extension or cover made of metallic materials.

It covers valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900,

corresponding to nominal pipe sizes NPS: 3/8; 1/2; 3/4; 1; 11/4; 11/2; 2; 21/2; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36,

and applies to pressure designations:

  • PN 16; 25; 40; 100; 160; 250.

  • Class 150; 300; 600; 800; 900; 1 500.

NOTE

PN 250 and Class 1 500 in sizes DN > 100 and NPS > 4 are not covered in this part of ISO 28921 .


This product includes: